fix(welcome-page): send analytics on join

react/features/analytics/AnalyticsEvents.js

@@ -462,3 +462,22 @@ export const createTrackMutedEvent = function(mediaType, reason, muted = true) {
         }
     };
 };
+
+/**
+ * Creates an event for an action on the welcome page.
+ *
+ * @param {string} action - The action that the event represents.
+ * @param {string} actionSubject - The subject that was acted upon.
+ * @param {boolean} attributes - Additional attributes to attach to the event.
+ * @returns {Object} The event in a format suitable for sending via
+ * sendAnalytics.
+ */
+export const createWelcomePageEvent
+    = function(action, actionSubject, attributes = {}) {
+        return {
+            action,
+            actionSubject,
+            attributes,
+            source: 'welcomePage'
+        };
+    };

react/features/welcome/components/AbstractWelcomePage.js

@@ -5,6 +5,7 @@ import { Component } from 'react';
 
 import { appNavigate } from '../../app';
 import { showAppSettings } from '../../app-settings';
+import { createWelcomePageEvent, sendAnalytics } from '../../analytics';
 import { isRoomValid } from '../../base/conference';
 
 import { generateRoomWithoutSeparator } from '../functions';
@@ -171,6 +172,12 @@ export class AbstractWelcomePage extends Component<*, *> {
     _onJoin() {
         const room = this.state.room || this.state.generatedRoomname;
 
+        sendAnalytics(
+            createWelcomePageEvent('clicked', 'joinButton', {
+                isGenerated: !this.state.room,
+                room
+            }));
+
         if (room) {
             this.setState({ joining: true });